Included with the tester are detailed instructions for ease of use and interpretation of results.
Hawk Compression Tester Model No. 705 with Instructions
Vintage Compression Tester Model No. 5 Harvey E. Hanson CO. Paw Paw, Mich. USA
VTG HAWK DELUXE COMPRESSION TESTER W/INSTRUCTIONS
Vintage, Hawk Deluxe Compression Tester, 0 to 250 PSI, Black
Vintage Hawk Classic Compression Tester 0 to 250 PSI
Vintage Compression Tester Compression Checker with Adapters Hoses Made in USA
